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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,041,874 | 61,719 | 57,255 |
| 2006 | $678,235 | 33,804 | 33,396 |
| 2007 | $336,681 | 13,712 | 13,114 |
| 2008 | $240,564 | 8,706 | 9,355 |
| 2009 | $227,632 | 5,709 | 5,404 |
| 2010 | $222,180 | 7,645 | 5,104 |
| 2011 | $311,712 | 8,478 | 8,443 |
Note: Quantity represents Number of pairs
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